A fundamental simple machine consisting of a rigid beam that rotates around a fixed hinge or fulcrum. By applying an input force at a distance from the fulcrum, it generates a proportional output force at another point, trading the distance moved for a multiplier in force. Engineers classify them into three classes based on the relative positions of the effort, load, and fulcrum.
Heard on the job
We can pop that seized bearing out if we use a longer pry bar as a lever.